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Date: Fri, 17 Feb 2017 08:37:07 +0800
From: kbuild test robot <lkp@...el.com>
To: Thomas Garnier <thgarnie@...gle.com>
Cc: kbuild-all@...org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, "H . Peter Anvin" <hpa@...or.com>,
	Jonathan Corbet <corbet@....net>,
	Thomas Garnier <thgarnie@...gle.com>,
	Kees Cook <keescook@...omium.org>,
	Lorenzo Stoakes <lstoakes@...il.com>,
	Juergen Gross <jgross@...e.com>,
	Andy Lutomirski <luto@...capital.net>,
	"Rafael J . Wysocki" <rjw@...ysocki.net>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	Jiri Kosina <jikos@...nel.org>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	Rusty Russell <rusty@...tcorp.com.au>, Borislav Petkov <bp@...e.de>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	Brian Gerst <brgerst@...il.com>, He Chen <he.chen@...ux.intel.com>,
	"Luis R . Rodriguez" <mcgrof@...nel.org>,
	Stanislaw Gruszka <sgruszka@...hat.com>,
	Arnd Bergmann <arnd@...db.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Dave Hansen <dave.hansen@...el.com>,
	Vitaly Kuznetsov <vkuznets@...hat.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Josh Poimboeuf <jpoimboe@...hat.com>,
	Tim Chen <tim.c.chen@...ux.intel.com>,
	Andi Kleen <ak@...ux.intel.com>, Jiri Olsa <jolsa@...hat.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Joerg Roedel <joro@...tes.org>, Paolo Bonzini <pbonzini@...hat.com>,
	Radim Krčmář <rkrcmar@...hat.com>,
	Andy Lutomirski <luto@...nel.org>, x86@...nel.org,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-efi@...r.kernel.org,
	xen-devel@...ts.xenproject.org, lguest@...ts.ozlabs.org,
	kvm@...r.kernel.org, kernel-hardening@...ts.openwall.com
Subject: Re: [PATCH v4 1/4] x86/mm: Adapt MODULES_END based on Fixmap section
 size

Hi Thomas,

[auto build test ERROR on next-20170216]
[also build test ERROR on v4.10-rc8]
[cannot apply to tip/x86/core kvm/linux-next tip/auto-latest v4.9-rc8 v4.9-rc7 v4.9-rc6]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Thomas-Garnier/x86-mm-Adapt-MODULES_END-based-on-Fixmap-section-size/20170217-072759
config: x86_64-randconfig-h0-02170640 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All error/warnings (new ones prefixed by >>):

>> arch/x86/mm/dump_pagetables.c:87:2: error: implicit declaration of function '__fix_to_virt' [-Werror=implicit-function-declaration]
     { MODULES_END,          "End Modules" },
     ^
   In file included from arch/x86/include/asm/pgtable_types.h:240:0,
                    from arch/x86/include/asm/paravirt_types.h:44,
                    from arch/x86/include/asm/ptrace.h:71,
                    from arch/x86/include/asm/math_emu.h:4,
                    from arch/x86/include/asm/processor.h:11,
                    from arch/x86/include/asm/cpufeature.h:4,
                    from arch/x86/include/asm/thread_info.h:52,
                    from include/linux/thread_info.h:25,
                    from arch/x86/include/asm/preempt.h:6,
                    from include/linux/preempt.h:59,
                    from include/linux/spinlock.h:50,
                    from include/linux/wait.h:8,
                    from include/linux/fs.h:5,
                    from include/linux/debugfs.h:18,
                    from arch/x86/mm/dump_pagetables.c:15:
>> arch/x86/include/asm/pgtable_64_types.h:71:37: error: '__end_of_fixed_addresses' undeclared here (not in a function)
    #define MODULES_END   __fix_to_virt(__end_of_fixed_addresses + 1)
                                        ^
>> arch/x86/mm/dump_pagetables.c:87:4: note: in expansion of macro 'MODULES_END'
     { MODULES_END,          "End Modules" },
       ^
   cc1: some warnings being treated as errors

vim +/__fix_to_virt +87 arch/x86/mm/dump_pagetables.c

926e5392b Arjan van de Ven 2008-04-17   9   * This program is free software; you can redistribute it and/or
926e5392b Arjan van de Ven 2008-04-17  10   * modify it under the terms of the GNU General Public License
926e5392b Arjan van de Ven 2008-04-17  11   * as published by the Free Software Foundation; version 2
926e5392b Arjan van de Ven 2008-04-17  12   * of the License.
926e5392b Arjan van de Ven 2008-04-17  13   */
926e5392b Arjan van de Ven 2008-04-17  14  
fe770bf03 H. Peter Anvin   2008-04-17 @15  #include <linux/debugfs.h>
fe770bf03 H. Peter Anvin   2008-04-17  16  #include <linux/mm.h>
84e629b66 Paul Gortmaker   2016-07-13  17  #include <linux/init.h>
146fbb766 Andrey Ryabinin  2017-02-10  18  #include <linux/sched.h>
926e5392b Arjan van de Ven 2008-04-17  19  #include <linux/seq_file.h>
926e5392b Arjan van de Ven 2008-04-17  20  
926e5392b Arjan van de Ven 2008-04-17  21  #include <asm/pgtable.h>
926e5392b Arjan van de Ven 2008-04-17  22  
926e5392b Arjan van de Ven 2008-04-17  23  /*
926e5392b Arjan van de Ven 2008-04-17  24   * The dumper groups pagetable entries of the same type into one, and for
926e5392b Arjan van de Ven 2008-04-17  25   * that it needs to keep some state when walking, and flush this state
926e5392b Arjan van de Ven 2008-04-17  26   * when a "break" in the continuity is found.
926e5392b Arjan van de Ven 2008-04-17  27   */
926e5392b Arjan van de Ven 2008-04-17  28  struct pg_state {
926e5392b Arjan van de Ven 2008-04-17  29  	int level;
926e5392b Arjan van de Ven 2008-04-17  30  	pgprot_t current_prot;
926e5392b Arjan van de Ven 2008-04-17  31  	unsigned long start_address;
926e5392b Arjan van de Ven 2008-04-17  32  	unsigned long current_address;
fe770bf03 H. Peter Anvin   2008-04-17  33  	const struct addr_marker *marker;
3891a04aa H. Peter Anvin   2014-04-29  34  	unsigned long lines;
ef6bea6dd Borislav Petkov  2014-01-18  35  	bool to_dmesg;
e1a58320a Stephen Smalley  2015-10-05  36  	bool check_wx;
e1a58320a Stephen Smalley  2015-10-05  37  	unsigned long wx_pages;
926e5392b Arjan van de Ven 2008-04-17  38  };
926e5392b Arjan van de Ven 2008-04-17  39  
fe770bf03 H. Peter Anvin   2008-04-17  40  struct addr_marker {
fe770bf03 H. Peter Anvin   2008-04-17  41  	unsigned long start_address;
fe770bf03 H. Peter Anvin   2008-04-17  42  	const char *name;
3891a04aa H. Peter Anvin   2014-04-29  43  	unsigned long max_lines;
fe770bf03 H. Peter Anvin   2008-04-17  44  };
926e5392b Arjan van de Ven 2008-04-17  45  
92851e2fc Andres Salomon   2010-07-20  46  /* indices for address_markers; keep sync'd w/ address_markers below */
92851e2fc Andres Salomon   2010-07-20  47  enum address_markers_idx {
92851e2fc Andres Salomon   2010-07-20  48  	USER_SPACE_NR = 0,
92851e2fc Andres Salomon   2010-07-20  49  #ifdef CONFIG_X86_64
92851e2fc Andres Salomon   2010-07-20  50  	KERNEL_SPACE_NR,
92851e2fc Andres Salomon   2010-07-20  51  	LOW_KERNEL_NR,
92851e2fc Andres Salomon   2010-07-20  52  	VMALLOC_START_NR,
92851e2fc Andres Salomon   2010-07-20  53  	VMEMMAP_START_NR,
8a5a5d153 Mathias Krause   2014-09-07  54  # ifdef CONFIG_X86_ESPFIX64
3891a04aa H. Peter Anvin   2014-04-29  55  	ESPFIX_START_NR,
8a5a5d153 Mathias Krause   2014-09-07  56  # endif
92851e2fc Andres Salomon   2010-07-20  57  	HIGH_KERNEL_NR,
92851e2fc Andres Salomon   2010-07-20  58  	MODULES_VADDR_NR,
92851e2fc Andres Salomon   2010-07-20  59  	MODULES_END_NR,
92851e2fc Andres Salomon   2010-07-20  60  #else
92851e2fc Andres Salomon   2010-07-20  61  	KERNEL_SPACE_NR,
92851e2fc Andres Salomon   2010-07-20  62  	VMALLOC_START_NR,
92851e2fc Andres Salomon   2010-07-20  63  	VMALLOC_END_NR,
92851e2fc Andres Salomon   2010-07-20  64  # ifdef CONFIG_HIGHMEM
92851e2fc Andres Salomon   2010-07-20  65  	PKMAP_BASE_NR,
92851e2fc Andres Salomon   2010-07-20  66  # endif
92851e2fc Andres Salomon   2010-07-20  67  	FIXADDR_START_NR,
92851e2fc Andres Salomon   2010-07-20  68  #endif
92851e2fc Andres Salomon   2010-07-20  69  };
92851e2fc Andres Salomon   2010-07-20  70  
fe770bf03 H. Peter Anvin   2008-04-17  71  /* Address space markers hints */
fe770bf03 H. Peter Anvin   2008-04-17  72  static struct addr_marker address_markers[] = {
fe770bf03 H. Peter Anvin   2008-04-17  73  	{ 0, "User Space" },
fe770bf03 H. Peter Anvin   2008-04-17  74  #ifdef CONFIG_X86_64
fe770bf03 H. Peter Anvin   2008-04-17  75  	{ 0x8000000000000000UL, "Kernel Space" },
0483e1fa6 Thomas Garnier   2016-06-21  76  	{ 0/* PAGE_OFFSET */,   "Low Kernel Mapping" },
0483e1fa6 Thomas Garnier   2016-06-21  77  	{ 0/* VMALLOC_START */, "vmalloc() Area" },
0483e1fa6 Thomas Garnier   2016-06-21  78  	{ 0/* VMEMMAP_START */, "Vmemmap" },
8a5a5d153 Mathias Krause   2014-09-07  79  # ifdef CONFIG_X86_ESPFIX64
3891a04aa H. Peter Anvin   2014-04-29  80  	{ ESPFIX_BASE_ADDR,	"ESPfix Area", 16 },
8a5a5d153 Mathias Krause   2014-09-07  81  # endif
8266e31ed Mathias Krause   2014-09-21  82  # ifdef CONFIG_EFI
8266e31ed Mathias Krause   2014-09-21  83  	{ EFI_VA_END,		"EFI Runtime Services" },
8266e31ed Mathias Krause   2014-09-21  84  # endif
fe770bf03 H. Peter Anvin   2008-04-17  85  	{ __START_KERNEL_map,   "High Kernel Mapping" },
9a79cf9c1 Yinghai Lu       2008-03-07  86  	{ MODULES_VADDR,        "Modules" },
9a79cf9c1 Yinghai Lu       2008-03-07 @87  	{ MODULES_END,          "End Modules" },
fe770bf03 H. Peter Anvin   2008-04-17  88  #else
fe770bf03 H. Peter Anvin   2008-04-17  89  	{ PAGE_OFFSET,          "Kernel Mapping" },
fe770bf03 H. Peter Anvin   2008-04-17  90  	{ 0/* VMALLOC_START */, "vmalloc() Area" },

:::::: The code at line 87 was first introduced by commit
:::::: 9a79cf9c1aa671325fa5ba37576c2cee23823d04 x86: sort address_markers for dump_pagetables

:::::: TO: Yinghai Lu <yhlu.kernel@...il.com>
:::::: CC: Ingo Molnar <mingo@...e.hu>

---
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